]> git.baikalelectronics.ru Git - kernel.git/commit
arm64: KVM: Report SMCCC_ARCH_WORKAROUND_1 BP hardening support
authorMarc Zyngier <marc.zyngier@arm.com>
Tue, 6 Feb 2018 17:56:14 +0000 (17:56 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Tue, 6 Feb 2018 22:54:05 +0000 (22:54 +0000)
commit50a4053fb4d6d0af21f9d974a6b683c067f9014a
treecdabac4f0a97488800cf46264d53b3cbbefbd65c
parent88c1c8a14a1e327c453f915acf5834b670cb0905
arm64: KVM: Report SMCCC_ARCH_WORKAROUND_1 BP hardening support

A new feature of SMCCC 1.1 is that it offers firmware-based CPU
workarounds. In particular, SMCCC_ARCH_WORKAROUND_1 provides
BP hardening for CVE-2017-5715.

If the host has some mitigation for this issue, report that
we deal with it using SMCCC_ARCH_WORKAROUND_1, as we apply the
host workaround on every guest exit.

Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arch/arm/include/asm/kvm_host.h
arch/arm64/include/asm/kvm_host.h
include/linux/arm-smccc.h
virt/kvm/arm/psci.c